Visual Source Safe factory improvements

The issue 'MPCHANGELOG-65' raises a real problem since vss feed is formatted according to regional settings of the machine. Moreover there is no way in java to get those regional settings (cf: http://forum.java.sun.com/thread.jspa?threadID=24929&messageID=2636438). So, by default we can expect to get the following VSS date format : 'MM/dd/yy h:mma' which could be overwritten if necessary with property 'maven.changelog.vsslib.dateFormat'.

For instance, in Geneva (fr_CH), the correct date format is 'dd/MM/yy HH:mm'.

The patch enclosed include this improvement with others minor changes:

• Add jUnit tests with dummy VSS history feed
• Fix bug when vss project specified in the scm connection string ended with '/'. In that case we got an exception 'String out of range : -1'
• Patch submitted with issue 'MPCHANGELOG-65' to fix bug when vss history feed contained label items didn't pass junit tests.

thanks